http://medicalxpress.com/ en-us Medical Xpress internet news portal provides the latest news on Health and Medicine. Given how effectively the immune system can eliminate foreign threats such bacteria and viruses, hopes are high for the development of strategies that might turn these same defense mechanisms against cancerous targets. However, attempts to train the immune system to recognize malignancies via the intravenous injection of vaccines that present tumor-derived antigens have fallen short. http://medicalxpress.com/news/2011-04-tumor-vaccines-proper-introduction.html Cancer Fri, 08 Apr 2011 12:04:04 EST news221483025